body{
    padding: 0px;
    margin: 0px;
}
.top{
    width: 100%;
    height: 50px;
    background-color: dodgerblue;
}
.top ul{
    width: 1200px;
    height: 50px;
    padding: 0px;
    margin: 0px;
}
.top ul li{
    width: 200px;
    height: 50px;
    list-style: none;
    float: left;
    text-align: center;
    line-height: 50px;
}
.top ul li >a{
    color: white;
    text-decoration: none;
    font-family: 微软雅黑;
    font-size: 20px;
}
.top ul li:hover{
    background-color: blue;
    width: 200px;
    height: 50px;
}
.top ul li a:hover{
    color: white;
    text-decoration: none;
    font-family: 微软雅黑;
    font-size: 20px;

}
.denglu{
    width: 1200px;
    height: 20px;
    margin: 0 auto;
    text-align: right;
}
.denglu >a{

    text-decoration: none;
    font-family: 微软雅黑;
    font-size: 14px;

}